458 



DR. CHARLES H. LEES ON THE EFFECT OF TEMPEIIATUKE ON THK 



ft. Naphthol. (M.P. = 122 C.) 



The tube was filled by heating in an oil bath, and cooling as described under 

 paraffin. 



p 

 CURRENT in Heaters '991 ampere. C 8 = '982. k p = '00971 



Oae 



With these results may be compared those obtained by testing a disc, '17 centim. 

 thick, sawn from a block of the material and placed between copper plates, as in the 

 case of Naphthaline (LEES, ' Phil. Trans.,' A, vol. 191, p. 416 (1898)). k at 

 32 C. = '00081, at 61 C. = '00062. There seems no evidence in the present case of 

 the higher conductivity at about 30 C. found in the former experiments. 



